January weather forecast
Poipu, HI

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Weather in January

Starting the year, Poipu witnesses a moderate-emergency situation with a significant amount of sunlight. The change in temperature remains benign, showing a narrow margin compared to the preceding or following month. Humidity, daylight, and UV index present a balanced nature, ensuring mild weather conditions. Wind velocity does not pose any threat to outdoor activities in Poipu. Of noteworthy mention is the rainfall, which stands at 1.57" (40mm), the lowest in the first quarter of the year.

Temperature

In January, Poipu notes an average high-temperature of a still warm 74.7°F (23.7°C), hardly different from the preceding month. Poipu experiences a subtle drop in temperature during the January nights, recording an average of 69.6°F (20.9°C).

Humidity

The least humid month is January, with an average relative humidity of 75%.

Rainfall

In Poipu, Hawaii, in January, it is raining for 12.5 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in Poipu, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Daylight

In Poipu, the average length of the day in January is 10h and 59min.
On the first day of the month, sunrise is at 7:16 am and sunset at 6:06 pm. On the last day of January, sunrise is at 7:16 am and sunset at 6:26 pm HST.

Sunshine

The average sunshine in January is 8.1h.

UV index

The months with the lowest UV index are January through August, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: During January, 6 as the daily maximum UV index converts into the following advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in January?

The average high-temperature and low-temperature during January are 74.7°F (23.7°C) and 69.6°F (20.9°C) respectively.

What is the least humid month?

The least humid month is January, with an average relative humidity of 75%.

What is the average humidity in January?

In Poipu, the average relative humidity in January is 75%.

How many days does it rain in January in Poipu?

In Poipu, Hawaii, in January, it is raining for 12.5 days, with typically 1.57" (40mm) of accumulated precipitation.

How many hours of daylight does Poipu have in January?

In Poipu, the average day length in January is 10h and 59min.

When is the sunrise / sunset in January?

On the first day of January, sunrise is at 7:16 am and sunset at 6:06 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:26 pm HST.

How many hours of sunshine does Poipu have in January?

In Poipu, the average sunshine duration in January is 8.1h.

When is the lowest UV index?

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index.

How high is the UV index in January in Poipu?

The average daily maximum UV index in January is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Poipu, HI

Average temperature in January - Poipu, HI
  • Average high temperature in January: 74.7°F

The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).

  • Average low temperature in January: 69.6°F

The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).

Average pressure in January
Poipu, HI

Average pressure in January - Poipu, HI
  • Average pressure in January: 30.01"Hg

The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).

Average wind speed in January
Poipu, HI

Average wind speed in January - Poipu, HI
  • Average wind speed in January: 10mph

The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).

Average humidity in January
Poipu, HI

Average humidity in January - Poipu, HI
  • Average humidity in January: 75%

The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).

Average rainfall in January
Poipu, HI

Average rainfall in January - Poipu, HI
  • Average rainfall in January: 1.57"

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

Average rainfall days in January
Poipu, HI

Average rainfall days in January - Poipu, HI
  • Average rainfall days in January: 12.5 days

The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).

Average daylight in January /
Average sunshine in January
Poipu, HI

Average daylight in January / Average sunshine in January - Poipu, HI
  • Average daylight in January: 11h and 0min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 48min).

  • Average sunshine in January: 8h and 1min

The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).

Average sunshine days in January
Poipu, HI

Average sunshine days in January - Poipu, HI
  • Average sunshine days in January: 12.8 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

Average UV index in January
Poipu, HI

Average UV index in January - Poipu, HI
  • Average UV index in January: 6

The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).

Average cloud cover in January
Poipu, HI

Average cloud cover in January - Poipu, HI
  • Average cloud cover in January: 38

The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).

Average visibility in January
Poipu, HI

Average visibility in January - Poipu, HI
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Poipu, Hawaii, USA

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